Source : Webster's Revised Unabridged Dictionary (1913)

Unalloyed \Un`al*loyed"\, a.
   Not alloyed; not reduced by foreign admixture; unmixed;
   unqualified; pure; as, unalloyed metals; unalloyed happiness.

         I enjoyed unalloyed satisfaction in his company.
                                                  --Mitford.

Source : WordNet®

unalloyed
     adj : used of metals